A water rocket, launched from the ground, rises vertically with acceleration of 20 m/s2 for 1.0 s when it runs out of "fuel.". Disregarding air resistance, how high will the rocket rise?
a. 15 m
c. 61 m
b. 30 m
d. 102 m
B
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Acceleration: A water rocket can reach a speed of 75 m/s in 0.050 seconds from launch. What is its average acceleration?
Fill in the blank(s) with the appropriate word(s).
Conservation of Momentum: In a police ballistics test, 2.00-g bullet traveling at 700 m/s suddenly hits and becomes embedded in a stationary 5.00-kg wood block. What is the speed of the block immediately after the bullet has stopped moving relative to the block?
Fill in the blank(s) with the appropriate word(s).
Rotational Kinetic Energy: A pencil that is 15.7 cm long is released from a vertical position with the eraser end resting on a table. The eraser does not slip as it tips over. Treat the pencil like a uniform rod. What is the angular speed of the pencil just before it hits the table?
A. 13.7 rad/s B. 7.23 rad/s C. 3.70 rad/s D. 24.5 rad/s E. 16.8 rad/s
Our solar system is located about 27,000 light-years from the galactic center. How far does our solar system travel in one orbit?
A) 85,000 light-years B) 54,000 light-years C) 100,000 light-years D) 170,000 light-years